In magnetically coupled resonant wireless power transfer system, when two or more coils work under over-coupling, the original resonant frequency will split, thereby reducing the power transfer efficiency. For multi-load systems with different operating frequencies, a packetized multi-frequency wireless charging method based on frequency splitting is proposed. Two adjustment modes, axial and lateral, are designed for the adjustment coil. By adjusting the coupling coefficient, it is possible to switch different groups of loads for charging. The experimental results confirm that the two load coils receive 1.2W and 1.4W of power, respectively, when the proposed system is input with a DC voltage of 10V.